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Analog Devices Inc. LTC2055IDD#TRPBF
- Part No.:
- LTC2055IDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2055IDD#TRPBF.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,844
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Product details
Overview
LTC2055IDD#TRPBF from Analog Devices (formerly Linear Technology) is a dual, micropower, zero-drift operational amplifier in an 8-lead 3mm × 3mm DFN package, specified for –40°C to 85°C operation. It delivers 3μV max input offset voltage, 30nV/°C max drift, 130μA per amplifier supply current, rail-to-rail output swing, and 500kHz gain-bandwidth - enabling precision DC-coupled sensing in battery-powered instrumentation.
For engineers reviewing the LTC2055IDD#TRPBF datasheet, LTC2055IDD#TRPBF pinout, LTC2055IDD#TRPBF application, or LTC2055IDD#TRPBF equivalent, key selection criteria include guaranteed industrial-temperature zero-drift performance, DFN package thermal characteristics, dual-channel layout efficiency, and compatibility with low-voltage single-supply (2.7V–6V) or bipolar (±2.5V) systems.
Technical Context
The LTC2055IDD#TRPBF employs auto-zeroing architecture with a 1kHz internal clock to continuously correct input offset and drift, achieving near-zero DC error over temperature and common-mode voltage. Its input stage supports rail-to-rail common-mode range (V– to V+ – 0.5V) and features 1pA typical input bias current at 25°C.
It integrates two matched amplifiers sharing a common substrate in a thermally symmetric DFN package, enabling high CMRR (130dB typ) and PSRR (130dB typ), while its 1.6μVP-P (0.01Hz–10Hz) noise and 140dB open-loop gain support high-resolution DC signal conditioning without external trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 6V single supply or ±2.5V dual supply - enables direct interface with Li-ion batteries and standard logic rails. |
| Input Offset Voltage (Max) | ±3μV over –40°C to 85°C - eliminates need for manual nulling in precision bridge or sensor front-ends. |
| Offset Drift (Max) | ±30nV/°C - ensures <1μV total drift across full industrial temperature range, critical for unattended long-term measurements. |
| Supply Current (Per Amp) | 130μA typical - allows dual-channel operation under 260μA, supporting >1-year battery life in 10μA sleep-cycle systems. |
| Gain-Bandwidth Product | 500kHz - supports stable closed-loop gains up to ~500 at unity-gain-stable configuration for anti-aliasing or active filtering. |
| Output Swing | Rail-to-rail (e.g., 2.98V at 3V supply into 100kΩ) - maximizes dynamic range in low-voltage data acquisition without level-shifting. |
| CMRR / PSRR | 130dB typical - rejects power supply ripple and common-mode interference in noisy industrial environments. |
Pinout & Package
Package: 8-lead (3mm × 3mm × 0.8mm) plastic DFN with exposed metal pad internally connected to V–. Thermal resistance θJA = 160°C/W with minimal PCB copper; reduced with expanded ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Amplifier A output | Capable of sourcing/sinking ≥5mA; rail-to-rail swing supports direct ADC driving or LED biasing. |
| 2: –IN A | Inverting input A | High-impedance node (1pA bias); sensitive to layout-induced leakage - requires guard ring in high-Z applications. |
| 3: +IN A | Non-inverting input A | Matches –IN A in offset and drift; used for reference buffering or differential pair inputs. |
| 4: V– | Negative supply / ground reference | Internally tied to exposed DFN pad; must be low-impedance connection for optimal PSRR and thermal stability. |
| 5: V+ | Positive supply | Accepts 2.7–6V; decoupling capacitor required within 2mm for high-frequency PSRR preservation. |
| 6: OUT B | Amplifier B output | Electrically isolated from OUT A; enables independent dual-path signal conditioning on shared substrate. |
| 7: –IN B | Inverting input B | Matched to –IN A; supports fully differential configurations when paired with +IN B. |
| 8: +IN B | Non-inverting input B | Enables dual instrumentation amp topologies or independent sensor channels with shared V– reference. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-zeroing | Continuous correction at 1kHz clock eliminates aging and thermal gradient-induced offset errors in static measurements. |
| Ultra-low 0.01Hz–10Hz noise | 1.6μVP-P enables sub-16-bit resolution in DC-coupled weigh scales and thermocouple amplifiers without chopper artifacts. |
| Rail-to-rail output | Delivers full supply utilization (e.g., 0.003V to 2.997V at 3V) - avoids headroom loss in single-supply 12-bit+ SAR ADC interfaces. |
| Guaranteed industrial temp specs | 3μV VOS and 30nV/°C drift validated across –40°C to 85°C - removes derating uncertainty in outdoor or automotive cabin electronics. |
| DFN thermal performance | Exposed V– pad lowers junction-to-board θJB, enabling sustained 260μA operation at 85°C ambient without derating. |
Applications
| Thermocouple Amplification | Electronic Scale Front-End |
|---|---|
Use Scenario: Amplifying µV-level Seebeck voltage from Type-K thermocouples in HVAC controllers with 0.1°C resolution. IC Role / Device Role / Timing Role: Dual op-amp configured as precision low-noise instrumentation amplifier with cold-junction compensation. Use Value: 3μV offset and 30nV/°C drift ensure <0.3°C absolute error over –20°C to 70°C ambient without calibration. | Use Scenario: Conditioning mV outputs from load-cell bridges in portable medical scales requiring FDA-grade accuracy. IC Role / Device Role / Timing Role: First-stage gain amplifier with matched dual channels for ratiometric excitation and differential readout. Use Value: Rail-to-rail output drives 24-bit sigma-delta ADC directly; 130μA per amp enables multi-hour battery operation. |
| Medical ECG Signal Conditioning | Battery-Powered Data Logger |
Use Scenario: Amplifying microvolt-level biopotentials in wearable ECG patches with strict size and power constraints. IC Role / Device Role / Timing Role: Dual-channel front-end: one amp for lead-I differential gain, second for right-leg drive feedback. Use Value: 1pA input bias prevents electrode polarization; 1.6μVP-P noise preserves QRS complex fidelity below 1Hz. | Use Scenario: Long-duration environmental monitoring using strain gauges and RTDs powered by coin cells. IC Role / Device Role / Timing Role: Precision sensor interface with programmable gain and zero-drift baseline stability over months. Use Value: Guaranteed 3μV VOS and 30nV/°C drift eliminate baseline drift correction algorithms, reducing firmware complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual zero-drift op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2055IMS8#TRPBF | Same core specs, but in 8-lead MSOP package with higher θJA (200°C/W) and no exposed thermal pad. | Preferred for prototyping with through-hole adapters or where DFN rework is constrained. | Select when board assembly infrastructure favors MSOP or thermal management uses external heatsinking instead of PCB copper. |
| AD8629ARZ | Single-supply only (2.7–5V), 1μV max VOS, 25nV/°C drift, but 220μA per amp - 70% higher quiescent current. | Suitable for ultra-low-offset single-channel needs where dual functionality is not required. | Choose only if sub-1μV offset is mandatory and power budget allows >200μA per channel. |
Compared with LTC2055IMS8#TRPBF, the LTC2055IDD#TRPBF offers superior thermal dissipation via its exposed V– pad and smaller footprint; versus AD8629ARZ, it provides dual-channel integration and 40% lower supply current at the cost of slightly higher offset, making it optimal for space- and power-constrained dual-sensor systems.
Availability
LTC2055IDD#TRPBF is available at Aetrix Electronics and suitable for precision instrumentation, medical device front-ends, and battery-powered industrial sensors requiring stable component supply across extended production lifecycles.
Supply support for LTC2055IDD#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and maintains its precision analog portfolio, renowned for benchmark performance in op-amps, references, and signal chains.
The LTC2055 belongs to Linear's zero-drift op-amp family, engineered specifically for high-accuracy, low-power DC signal conditioning in harsh thermal environments - targeting applications where offset drift dominates system error budgets.
FAQ
What is the maximum operating temperature range for the LTC2055IDD#TRPBF?
The LTC2055IDD#TRPBF is specified for operation from –40°C to +85°C. This industrial temperature grade is guaranteed per datasheet Electrical Characteristics tables, with all key parameters - including input offset voltage (±3μV max) and drift (±30nV/°C max) - validated across this full range. The DFN package's exposed V– pad enhances thermal reliability at the upper limit.
Does the LTC2055IDD#TRPBF require external capacitors for stability?
No, the LTC2055IDD#TRPBF is unity-gain stable and does not require external compensation capacitors. However, a 0.1μF ceramic decoupling capacitor between V+ and V–, placed within 2mm of the DFN pads, is mandatory to maintain PSRR and prevent oscillation due to supply impedance. Output loading above 100pF may require series resistance per layout guidelines.
How does the auto-zeroing clock affect signal integrity in the LTC2055IDD#TRPBF?
The LTC2055IDD#TRPBF uses a 1kHz internal auto-zeroing clock. Its primary artifact is <0.2μVRMS input-referred residue at 1kHz, which appears amplified at the output. In DC or low-frequency applications (<10Hz), this is negligible. For AC-coupled signals, bandpass filtering or synchronous sampling at multiples of 1kHz suppresses this tone without impacting DC accuracy.
Can the LTC2055IDD#TRPBF drive ADC inputs directly?
Yes, the LTC2055IDD#TRPBF's rail-to-rail output swing (e.g., 0.003V to 2.997V at 3V supply into 100kΩ) and low output impedance (<1Ω) allow direct connection to SAR and sigma-delta ADCs. For 16-bit+ resolution, use a 10Ω isolation resistor and 1nF capacitor at the ADC input to limit charge kickback; avoid driving switched-capacitor inputs without buffering.
Is the exposed pad on the LTC2055IDD#TRPBF DFN package electrically connected?
Yes, the exposed metal pad on the underside of the LTC2055IDD#TRPBF DFN package is internally connected to the V– pin (Pin 4). It must be soldered to a PCB copper pour tied to the system ground or negative supply plane. This connection is essential for achieving the specified θJA = 160°C/W and maintaining PSRR/CMRR performance.
LTC2055IDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 500 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 0.5 µV
- Current - Supply:
- 130µA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LTC2055IDD#TRPBF FAQ
1.How can I place an order for LTC2055IDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2055IDD#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC2055IDD#TRPBF reliable?
The price and inventory of LTC2055IDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2055IDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2055IDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2055IDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2055IDD#TRPBF?
LTC2055IDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2055IDD#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC2055IDD#TRPBF?
For technical support, including LTC2055IDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2055IDD#TRPBF requirements.
6.How does Aetrix verify that LTC2055IDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2055IDD#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC2055IDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2055IDD#TRPBF?
All LTC2055IDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2055IDD#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC2055IDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2055IDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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